A stochastic phase-field approach for the failure of rubberlike materials

Date

2025-01-01

Author

Açıkgöz, Kemal
Efe Tanış, Bülent
Dal, Hüsnü

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Although in the classical phase-field approach the assumption is a homogenized distribution of the critical energy release rate over the material, leading to catastrophic failure and hence brittle fracture; the experimental evidence regarding the fracture behaviour of rubber-like materials implies ductile-like progressive failure. To characterize and model the functioning of rubber-like materials, the phenomena is extremely vital as fatigue failure crack growth is holds substantial importance in engineering design processes. In this work, the critical entropic energy distribution is taken as a spatially varying material parameter to represent the stochasticity. Conducting a series of fracture experiments using die-cut v-shaped double edge notched specimens of unfilled styrene-butadiene rubber (SBR), stochastic properties of the rubbers were able to be shown over loaddisplacement curves. Results demonstrated ductile-like fracture in contrast with laser-cut specimens where the data obtained indicated the exhibition of a pronounced tendency towards sharp brittle fracture. Analyzing the results of the work, It is observed that ductile-like fracture propagates intermittently and follows intricate irregular paths even on homogeneous specimens. This complex behaviour challenges the conventional notions of fracture mechanics in rubber-like materials and provides significant insight for engineering design and materials science, leading the research to pave the way for more reliable engineering applications.

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https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85217689354&origin=inward
https://hdl.handle.net/11511/113648

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Department of Mechanical Engineering, Conference / Seminar